Gluteal Muscles Flashcards

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Questions and Answers

What is the origin of the Gluteus Maximus?

posterior ilium and sacrum

Where does the Gluteus Maximus insert?

gluteal tuberosity of femur and iliotibial tract

What is the action of the Gluteus Maximus?

extend thigh and laterally rotate thigh

What innervates the Gluteus Maximus?

inferior gluteal nerve Signup and view all the answers

What is the origin of the Gluteus Minimus?

lateral ilium Signup and view all the answers

Where does the Gluteus Minimus insert?

greater trochanter Signup and view all the answers

What are the actions of the Gluteus Minimus?

anterior fibers=flex thigh and medially rotate thigh, middle fibers=abduct thigh, posterior fibers=extend thigh and laterally rotate thigh Signup and view all the answers

What innervates the Gluteus Minimus?

superior gluteal nerve Signup and view all the answers

What is the origin of the Gluteus Medius?

lateral ilium Signup and view all the answers

Where does the Gluteus Medius insert?

greater trochanter Signup and view all the answers

What are the actions of the Gluteus Medius?

anterior fibers=flex thigh and medially rotate thigh, middle fibers=abduct thigh, posterior fibers=extend thigh and laterally rotate thigh Signup and view all the answers

What innervates the Gluteus Medius?

superior gluteal nerve Signup and view all the answers

What is the origin of the Tensor Fasciae Latae?

iliac crest and anterior superior iliac spine Signup and view all the answers

Where does the Tensor Fasciae Latae insert?

iliotibial tract Signup and view all the answers

What is the action of the Tensor Fasciae Latae?

abduct thigh and flex thigh Signup and view all the answers

What innervates the Tensor Fasciae Latae?

superior gluteal nerve Signup and view all the answers

What is the origin of the Piriformis?

anterior surface of sacrum Signup and view all the answers

Where does the Piriformis insert?

greater trochanter Signup and view all the answers

What is the action of the Piriformis?

laterally rotate thigh Signup and view all the answers

What innervates the Piriformis?

S1-S2 ventral rami Signup and view all the answers

Study Notes

Gluteal Muscles Overview

The gluteal muscles consist of the gluteus maximus, gluteus medius, gluteus minimus, tensor fasciae latae, and piriformis.
Each muscle has distinct origins, insertions, actions, and innervations important for understanding muscle function and anatomy.

Gluteus Maximus

Origin: Posterior aspects of the ilium and sacrum.
Insertion: Gluteal tuberosity of the femur and iliotibial tract.
Action: Extends and laterally rotates the thigh; critical for actions like standing up and climbing stairs.
Innervation: Innervated by the inferior gluteal nerve.

Gluteus Minimus

Origin: Lateral surface of the ilium.
Insertion: Greater trochanter of the femur.
Action:
- Anterior fibers: Flex and medially rotate the thigh.
- Middle fibers: Abduct the thigh.
- Posterior fibers: Extend and laterally rotate the thigh.
Innervation: Superior gluteal nerve.

Gluteus Medius

Origin: Lateral surface of the ilium.
Insertion: Greater trochanter of the femur.
Action:
- Anterior fibers: Flex and medially rotate the thigh.
- Middle fibers: Abduct the thigh.
- Posterior fibers: Extend and laterally rotate the thigh.
Innervation: Supplied by the superior gluteal nerve.

Tensor Fasciae Latae

Origin: Iliac crest and anterior superior iliac spine.
Insertion: Iliotibial tract, influencing knee stability.
Action: Functions in thigh abduction and flexion; important for stabilizing the hip and knee during movement.
Innervation: Also innervated by the superior gluteal nerve.

Piriformis

Origin: Anterior surface of the sacrum.
Insertion: Greater trochanter of the femur.
Action: Primarily responsible for laterally rotating the thigh; assists with hip stabilization.
Innervation: Innervated by the ventral rami of S1-S2 spinal nerves.

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Description

Test your knowledge on the gluteal muscles with this set of flashcards covering their origins, insertions, actions, and innervation. Perfect for students of anatomy or anyone looking to improve their understanding of these key muscle groups.